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Hybrid energy systems are essential for combining different clean generation technologies into a clean and stable power system, incorporating solar, wind and hydropower, as well as energy storage solutions.

Photovoltaic electricity generation is a rapidly growing industry, and a key pillar of a decarbonised energy system. In modern solar cells, laser technology is used to form localised structures such as a selective emitter through doping or to locally ablate dielectric layers for contact definition. A critical factor is the ability to passivate the laser-induced defects to prevent premature charge carrier recombination reducing the cell efficiency. Hydrogenation is such a passivation technique. The exact mechanisms have until recently been poorly understood, so this timely reference covers the recent breakthroughs in the understanding of hydrogen passivation.

Hydrogen is one of the most promising next-generation fuels. It has the highest energy content per unit weight of any known fuel and in comparison to the other known natural gases it is environmentally safe - in fact, its combustion results only in water vapour and energy. This book provides an overview of worldwide research in the use of hydrogen in energy development, its most innovative methods of production and the various steps necessary for the optimization of this product.

Hydrogen is a key vector towards a future sector-coupled and more integrated energy system. Hydrogen can be used as long term, even seasonal, storage for electricity itself, as well as a fuel in the transport and residential sectors, and as a feedstock for the chemical industries.

Hydrogen is a key vector of decarbonized energy systems. It can be used as long term and seasonal storage for electricity itself, as well as in the automotive sector, for space heating and for the chemical industry.